you get a great deal on a new subaru. we'll donate 250 dollars to a choi of charities that benefit your community. it feels good to be a helping hand. >>> earlier this evening in arizona, two sky divers collided in a fatal mid-air crash. a sobering reminder that a favorite past time for many thrill seekers can be deadly. but for the gopro bomb squad, nothing compares to the jumps on cameras. and when you look at the views, you might understand why. here's abc's alex perez. >> reporter: it's the ultimate extreme thrill. 5500 feet high above the mountains of northern utah, a brotherhood of daredevils, defying death as they hang from the skids of a helicopter. seconds away from their big jump. it's the magic these four friends have been making since 2008. marshall miller, jesse hall, neil and j.t. holmes. they formed the gopro bomb squad. >> with your friends, you get to hang out with your friends from a helicopter. >> reporter: "nightline" had full access as they gear up for a jump. and they put us right to work. >> over th